This nipple served as an exhaust pipe,(not my install because I would have used anti-seize) as you can see it’s pretty frozen. I have sprayed it with PB Blaster morning and night for the past three days, heated it with a propane torch, tapped on it for endless minutes hoping the penetrating fluid would work its way in. I used a pipe wrench and it’s a no-go. I do not adding think a breaker bar is a good idea in this case. Any input would be appreciated.